Journal Published Online: 29 October 2024
Volume 52, Issue 6

Performance Evaluation of a Novel Compound Modified Asphalt Composed of Anhydrous Calcium Sulfate Whisker and Waste Cooking Oil

CODEN: JTEVAB

Abstract

Waste recycling and reuse as road material have drawn significant attention because they improve pavement performance and reduce environmental pollution. In this study, anhydrous calcium sulfate whiskers (ACSW) were manually fabricated from phosphogypsum to produce an environmentally friendly asphalt pavement modification material. Furthermore, waste cooking oil (WCO), among the most widespread of waste oils, was employed to offset the adverse influence of ACSW on the LT properties of the asphalt. Various ACSW and WCO compound modified asphalts were designed and prepared, and their rheological properties were investigated to determine the optimum combination of ACSW and WCO. The results revealed that ACSW could strengthen the high-temperature anti-deformation of asphalt. In contrast, ACSW markedly decreased the LT anti-cracking properties. However, when WCO was introduced, the loss of LT performance caused by the ACSW was compensated. Therefore, the compound modified asphalt with 6% ACSW and 2% WCO was identified as the optimum combination because of the ideal rheological performance. Furthermore, the microscopic characteristics of the compound modified asphalt were examined via Fourier transform infrared spectroscopy, gel-permeation chromatography, and fluorescence microscopy. The microscopic analysis demonstrated that the modification caused by ACSW and WCO is only physical, and that WCO contributes to diminishing ACSW agglomeration and enhancing the uniformity of the compound modified asphalt system. This novel compound modified asphalt is anticipated to improve quality and increase waste material recycling.

Author Information

Liu, Yutong
School of Civil and Hydraulic Engineering, Huazhong University of Science and Technology, Wuhan, China School of Railway Engineering, Guangzhou Railway Polytechnic, Guangzhou, China
Luo, Hui
School of Civil and Hydraulic Engineering, Huazhong University of Science and Technology, Wuhan, China
Yang, Zeliang
School of Civil and Hydraulic Engineering, Huazhong University of Science and Technology, Wuhan, China
Pages: 15
Price: $25.00
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Stock #: JTE20240067
ISSN: 0090-3973
DOI: 10.1520/JTE20240067